A strain of marijuana sold in Harlem (and likely elsewhere in NYC) that looks like brownish schwag but gets you crazy high. Quite possibly laced with PCP.
"Dude, should we get lamb spread or chocolate?"
"Fuck that, let's just get delivery -- I don't feel like tripping my ass off on whatever's in that; I've got a paper due tomorrow."
Jamaican slang for high quality marijuana
Mi Haffi Bunn De Lambspread
lambmeat/rack of lamb fancifully prepared with all the trimmings
"I shot dread in the head, took the bread n the lamb spread"
freestyle onstage-Madison Square Garden